private PickedGeometry SearchPoint(RenderEventArgs arg, uint stageVertexId, int x, int y, uint lastVertexId, ZeroIndexPointSearcher searcher)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.From = this;
pickedGeometry.GeometryType = GeometryType.Line;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.VertexIds = new uint[] { searcher.Search(arg, x, y, lastVertexId, this), };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.VertexIds);
return(pickedGeometry);
}
/// <summary>
/// 是三角形，就pick一个三角形；是四边形，就pick一个四边形，是多边形，就pick一个多边形。
/// </summary>
/// <param name="stageVertexId"></param>
/// <param name="lastIndexId"></param>
/// <param name="typeOfMode"></param>
/// <returns></returns>
private PickedGeometry PickWhateverItIs(uint stageVertexId, RecognizedPrimitiveIndex lastIndexId, GeometryType typeOfMode)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.GeometryType = typeOfMode;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.From = this;
pickedGeometry.Indexes = lastIndexId.IndexIdList.ToArray();
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return(pickedGeometry);
}
private PickedGeometry SearchLine(RenderEventArgs arg, uint stageVertexId, int x, int y, uint lastVertexId, RecognizedPrimitiveIndex lastIndexId, OneIndexLineSearcher searcher)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.From = this;
pickedGeometry.GeometryType = GeometryType.Line;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.Indexes = searcher.Search(arg, x, y, lastIndexId, this);
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return(pickedGeometry);
}
private PickedGeometry PickPoint(uint stageVertexId, uint lastVertexId)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.GeometryType = GeometryType.Point;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.From = this;
pickedGeometry.Indexes = new uint[] { lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return(pickedGeometry);
}
/// <summary>
/// 是三角形，就pick一个三角形；是四边形，就pick一个四边形，是多边形，就pick一个多边形。
/// </summary>
/// <param name="stageVertexId"></param>
/// <param name="primitiveInfo"></param>
/// <param name="typeOfMode"></param>
/// <returns></returns>
private PickedGeometry PickWhateverItIs(uint stageVertexId, RecognizedPrimitiveInfo primitiveInfo, GeometryType typeOfMode)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.GeometryType = typeOfMode;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.From = this;
pickedGeometry.VertexIds = primitiveInfo.VertexIds;
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.VertexIds);
return(pickedGeometry);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <returns></returns>
public virtual PickedGeometry GetPickedGeometry(PickingEventArgs arg, uint stageVertexId)
{
PickedGeometry result = null;
PickerBase picker = this.picker;
if (picker != null)
{
result = picker.GetPickedGeometry(arg, stageVertexId);
}
return(result);
}
/// <summary>
/// Pick geometry at specified positon.
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="geometryTypes"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public PickedGeometry Pick(int x, int y, PickingGeometryTypes geometryTypes, int width, int height)
{
if (x < 0 || width <= x)
{
return(null);
}
if (y < 0 || height <= y)
{
return(null);
}
if (geometryTypes == 0)
{
return(null);
}
PickedGeometry pickedGeometry = null;
Framebuffer framebuffer = GetPickingFramebuffer(width, height);
framebuffer.Bind();
{
const float one = 1.0f;
GL.Instance.ClearColor(one, one, one, one);
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT | GL.GL_STENCIL_BUFFER_BIT);
var arg = new PickingEventArgs(this.Scene, x, y, geometryTypes);
this.RenderForPicking(this.Scene.RootElement, arg);
uint stageVertexId = ColorCodedPicking.ReadStageVertexId(x, y);
pickedGeometry = SearchGeometry(stageVertexId, arg, this.Scene.RootElement);
if (pickedGeometry != null)
{
var depth = new float[1];
GCHandle pinned = GCHandle.Alloc(depth, GCHandleType.Pinned);
IntPtr header = pinned.AddrOfPinnedObject();
// same with: IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
GL.Instance.ReadPixels(x, y, 1, 1, GL.GL_DEPTH_COMPONENT, GL.GL_FLOAT, header);
pinned.Free();
pickedGeometry.PickedPosition = new vec3(x, y, depth[0]);
}
}
framebuffer.Unbind();
return(pickedGeometry);
}
/// <summary>
/// Pick
/// </summary>
/// <param name="mousePosition">mouse position.</param>
/// <param name="pickingGeometryType">target's geometry type.</param>
/// <returns></returns>
public PickedGeometry ColorCodedPicking(Point mousePosition, GeometryType pickingGeometryType)
{
Rectangle clientRectangle = this.Canvas.ClientRectangle;
if (mousePosition.X < 0 || clientRectangle.Width <= mousePosition.X || mousePosition.Y < 0 || clientRectangle.Height <= mousePosition.Y)
{
return(null);
}
Rectangle rect = new Rectangle(mousePosition.X, mousePosition.Y, 1, 1);
if (!PickedSomething(rect, clientRectangle))
{
return(null);
}
lock (this.synObj)
{
var arg = new RenderEventArgs(RenderModes.ColorCodedPicking, clientRectangle, this.Camera, pickingGeometryType);
List <IColorCodedPicking> pickableRendererList = Render4Picking(arg);
List <Tuple <Point, uint> > stageVertexIdList = ReadPixels(rect, clientRectangle.Height);
var result = new List <Tuple <Point, PickedGeometry> >();
foreach (var tuple in stageVertexIdList)
{
int x = tuple.Item1.X;
int y = tuple.Item1.Y;
//if (x < 0 || clientRectangle.Width <= x || y < 0 || clientRectangle.Height <= y) { continue; }
uint stageVertexId = tuple.Item2;
PickedGeometry pickedGeometry = GetPickGeometry(arg,
x, y, stageVertexId, pickableRendererList);
if (pickedGeometry != null)
{
result.Add(new Tuple <Point, PickedGeometry>(tuple.Item1, pickedGeometry));
}
}
if (result.Count > 0)
{
return(result[0].Item2);
}
}
return(null);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="singleNodeVertexId"></param>
/// <param name="primitiveInfo"></param>
/// <param name="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchPoint(PickingEventArgs arg, uint singleNodeVertexId, uint stageVertexId, RecognizedPrimitiveInfo primitiveInfo, DrawElementsPointSearcher searcher)
{
uint id = searcher.Search(arg, primitiveInfo, singleNodeVertexId, stageVertexId, this);
if (id == uint.MaxValue)
{
return(null);
} // Scene's changed before second rendering for picking>
uint baseId = stageVertexId - singleNodeVertexId;
var vertexIds = new uint[] { (id - baseId) };
vec3[] positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(GeometryType.Point, positions, vertexIds, stageVertexId, this.Node);
return(pickedGeometry);
}
/// <summary>
/// get picked primitive
/// </summary>
/// <param name="arg"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="stageVertexId"></param>
/// <param name="pickableElements"></param>
/// <returns></returns>
private static PickedGeometry PickGeometry(RenderEventArgs arg,
int x, int y,
uint stageVertexId,
params IColorCodedPicking[] pickableElements)
{
PickedGeometry pickedGeometry = null;
foreach (var item in pickableElements)
{
pickedGeometry = item.Pick(arg, stageVertexId,
x, y);
if (pickedGeometry != null)
{
break;
}
}
return(pickedGeometry);
}
/// <summary>
/// get picked geometry.
/// </summary>
/// <param name="arg"></param>
/// <param name="x">mouse position</param>
/// <param name="y">mouse position</param>
/// <param name="stageVertexId"></param>
/// <param name="pickableRendererList"></param>
/// <returns></returns>
private static PickedGeometry GetPickGeometry(RenderEventArgs arg,
int x, int y,
uint stageVertexId,
List <IColorCodedPicking> pickableRendererList)
{
PickedGeometry pickedGeometry = null;
foreach (var item in pickableRendererList)
{
pickedGeometry = item.GetPickedGeometry(arg, stageVertexId, x, y);
if (pickedGeometry != null)
{
break;
}
}
return(pickedGeometry);
}
/// <summary>
/// Pick geometry at specified positon.
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="pickTriangle"></param>
/// <param name="pickQuad"></param>
/// <param name="pickPolygon"></param>
/// <returns></returns>
public PickedGeometry Pick(int x, int y, bool pickTriangle, bool pickQuad, bool pickPolygon)
{
PickingGeometryTypes geometryTypes = 0;
if (pickTriangle)
{
geometryTypes |= PickingGeometryTypes.Triangle;
}
if (pickQuad)
{
geometryTypes |= PickingGeometryTypes.Quad;
}
if (pickPolygon)
{
geometryTypes |= PickingGeometryTypes.Polygon;
}
if (geometryTypes == 0)
{
return(null);
}
PickedGeometry pickedGeometry = null;
Framebuffer framebuffer = GetPickingFramebuffer();
framebuffer.Bind();
{
const float one = 1.0f;
GL.Instance.ClearColor(one, one, one, one);
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT | GL.GL_STENCIL_BUFFER_BIT);
var arg = new PickingEventArgs(this.Scene, x, y, geometryTypes);
this.RenderForPicking(this.Scene.RootElement, arg);
uint stageVertexId = ColorCodedPicking.ReadStageVertexId(x, y);
pickedGeometry = Pick(stageVertexId, arg, this.Scene.RootElement);
}
framebuffer.Unbind();
return(pickedGeometry);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</param>
/// <returns></returns>
public PickedGeometry GetPickedGeometry(
RenderEventArgs arg,
uint stageVertexId,
int x, int y)
{
InnerPickableRenderer renderer = this.innerPickableRenderer;
if (renderer == null)
{
throw new Exception("InnerPickableRenderer is null!");
}
PickedGeometry result = this.innerPickableRenderer.GetPickedGeometry(arg, stageVertexId, x, y);
if (result != null)
{
result.FromRenderer = this;
}
return(result);
}
/// <summary>
/// Color Coded Picking
/// </summary>
/// <param name="arg"></param>
/// <param name="rect">picking area.</param>
/// <param name="pickableElements">picking among which elements?</param>
/// <returns></returns>
public static List <Tuple <Point, PickedGeometry> > Pick(
RenderEventArgs arg,
Rectangle rect,
params PickableRenderer[] pickableElements)
{
var result = new List <Tuple <Point, PickedGeometry> >();
if (pickableElements.Length == 0)
{
return(result);
}
if (!PickedSomething(rect, arg.CanvasRect))
{
return(result);
}
Render4Picking(arg, pickableElements);
List <Tuple <Point, uint> > stageVertexIdList = ReadPixels(rect, arg.CanvasRect.Height);
foreach (var tuple in stageVertexIdList)
{
int x = tuple.Item1.X;
int y = tuple.Item1.Y;
if (x < 0 || arg.CanvasRect.Width <= x || y < 0 || arg.CanvasRect.Height <= y)
{
continue;
}
uint stageVertexId = tuple.Item2;
PickedGeometry pickedGeometry = GetPickGeometry(arg,
x, y, stageVertexId, pickableElements);
if (pickedGeometry != null)
{
result.Add(new Tuple <Point, PickedGeometry>(new Point(x, y), pickedGeometry));
}
}
return(result);
}
/// <summary>
/// Pick geometry at specified positon.
/// </summary>
/// <param name="x">Left Down is (0, 0)</param>
/// <param name="y">Left Down is (0, 0)</param>
/// <param name="geometryType"></param>
/// <returns></returns>
public PickedGeometry Pick(int x, int y, GeometryType geometryType)
{
PickedGeometry pickedGeometry = null;
Framebuffer framebuffer = GetPickingFramebuffer();
framebuffer.Bind();
{
const float one = 1.0f;
GL.Instance.ClearColor(one, one, one, one);
GL.Instance.Clear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT | GL.GL_STENCIL_BUFFER_BIT);
var arg = new PickingEventArgs(this.Scene, x, y, geometryType.ToFlags());
this.RenderForPicking(this.Scene.RootElement, arg);
uint stageVertexId = ColorCodedPicking.ReadStageVertexId(x, y);
pickedGeometry = Pick(stageVertexId, arg, this.Scene.RootElement);
}
framebuffer.Unbind();
return(pickedGeometry);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <returns></returns>
public virtual PickedGeometry GetPickedGeometry(PickingEventArgs arg, uint stageVertexId)
{
PickedGeometry result = null;
PickerBase[] picker = this.picker;
if (picker != null)
{
var pickable = this as IPickable;
uint baseId = pickable.PickingBaseId;
for (int i = 0; i < picker.Length; i++)
{
var blockVertexCount = (uint)picker[i].PositionBuffer.Length;
if (baseId <= stageVertexId && stageVertexId < baseId + blockVertexCount)
{
result = picker[i].GetPickedGeometry(arg, stageVertexId, baseId);
break;
}
baseId += blockVertexCount;
}
}
return(result);
}
private PickedGeometry PickWhateverItIs(RenderEventArgs arg, uint stageVertexId, uint lastVertexId, DrawMode mode, PickingGeometryType typeOfMode)
{
//PickedGeometry pickedGeometry = new PickedGeometry();
//pickedGeometry.GeometryType = typeOfMode;
//pickedGeometry.StageVertexId = stageVertexId;
//pickedGeometry.FromRenderer = this;
// Fill primitive's position information.
int vertexCount = typeOfMode.GetVertexCount();
if (vertexCount == -1)
{
vertexCount = this.PositionBuffer.Length;
}
uint[] vertexIds; vec3[] positions;
if (lastVertexId == 0 && vertexCount == 2)
{
// This is when mode is GL_LINE_LOOP and picked last line(the loop back one)
PickingLastLineInLineLoop(out vertexIds, out positions);
}
else
{
// Other conditions
switch (typeOfMode)
{
case PickingGeometryType.Point:
vertexIds = new uint[] { lastVertexId, };
positions = FillPickedGeometrysPosition(lastVertexId, 1);
break;
case PickingGeometryType.Line:
vertexIds = new uint[] { lastVertexId - 1, lastVertexId, };
positions = FillPickedGeometrysPosition(lastVertexId - 1, 2);
break;
case PickingGeometryType.Triangle:
if (mode == DrawMode.TriangleFan)
{
vertexIds = new uint[] { 0, lastVertexId - 1, lastVertexId, };
positions = FillPickedGeometrysPosition(vertexIds);
}
else if (mode == DrawMode.TrianglesAdjacency || mode == DrawMode.TriangleStripAdjacency)
{
vertexIds = new uint[] { lastVertexId - 4, lastVertexId - 2, lastVertexId, };
positions = FillPickedGeometrysPosition(vertexIds);
}
else
{
vertexIds = new uint[] { lastVertexId - 2, lastVertexId - 1, lastVertexId, };
positions = FillPickedGeometrysPosition(lastVertexId - 2, 3);
}
break;
case PickingGeometryType.Quad:
vertexIds = new uint[] { lastVertexId - 3, lastVertexId - 2, lastVertexId - 1, lastVertexId, };
positions = FillPickedGeometrysPosition(lastVertexId - 3, 4);
break;
case PickingGeometryType.Polygon:
vertexIds = new uint[vertexCount];
for (uint i = 0; i < vertexCount; i++)
{
vertexIds[i] = lastVertexId + i;
}
positions = FillPickedGeometrysPosition(0, vertexCount);
break;
default:
throw new NotImplementedException();
}
}
PickedGeometry pickedGeometry = new PickedGeometry(typeOfMode, positions, vertexIds, stageVertexId, this);
return(pickedGeometry);
}
private PickedGeometry PickPoint(uint stageVertexId, uint lastVertexId)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.GeometryType = GeometryType.Point;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.From = this;
pickedGeometry.Indexes = new uint[] { lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return pickedGeometry;
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</param>
/// <param name="lastVertexId"></param>
/// <param name="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchPoint(RenderEventArgs arg, uint stageVertexId, int x, int y, uint lastVertexId, ZeroIndexPointSearcher searcher)
{
var vertexIds = new uint[] { searcher.Search(arg, x, y, lastVertexId, this), };
vec3[] positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(arg.UsingViewPort, PickingGeometryType.Line, positions, vertexIds, stageVertexId, this);
return pickedGeometry;
}
private PickedGeometry PickWhateverItIs(RenderEventArgs arg, uint stageVertexId, uint lastVertexId, DrawMode mode, PickingGeometryType typeOfMode)
{
//PickedGeometry pickedGeometry = new PickedGeometry();
//pickedGeometry.GeometryType = typeOfMode;
//pickedGeometry.StageVertexId = stageVertexId;
//pickedGeometry.FromRenderer = this;
// Fill primitive's position information.
int vertexCount = typeOfMode.GetVertexCount();
if (vertexCount == -1) { vertexCount = this.PositionBuffer.Length; }
uint[] vertexIds; vec3[] positions;
if (lastVertexId == 0 && vertexCount == 2)
{
// This is when mode is GL_LINE_LOOP and picked last line(the loop back one)
PickingLastLineInLineLoop(out vertexIds, out positions);
}
else
{
// Other conditions
switch (typeOfMode)
{
case PickingGeometryType.Point:
vertexIds = new uint[] { lastVertexId, };
positions = FillPickedGeometrysPosition(lastVertexId, 1);
break;
case PickingGeometryType.Line:
vertexIds = new uint[] { lastVertexId - 1, lastVertexId, };
positions = FillPickedGeometrysPosition(lastVertexId - 1, 2);
break;
case PickingGeometryType.Triangle:
if (mode == DrawMode.TriangleFan)
{
vertexIds = new uint[] { 0, lastVertexId - 1, lastVertexId, };
positions = FillPickedGeometrysPosition(vertexIds);
}
else if (mode == DrawMode.TrianglesAdjacency || mode == DrawMode.TriangleStripAdjacency)
{
vertexIds = new uint[] { lastVertexId - 4, lastVertexId - 2, lastVertexId, };
positions = FillPickedGeometrysPosition(vertexIds);
}
else
{
vertexIds = new uint[] { lastVertexId - 2, lastVertexId - 1, lastVertexId, };
positions = FillPickedGeometrysPosition(lastVertexId - 2, 3);
}
break;
case PickingGeometryType.Quad:
vertexIds = new uint[] { lastVertexId - 3, lastVertexId - 2, lastVertexId - 1, lastVertexId, };
positions = FillPickedGeometrysPosition(lastVertexId - 3, 4);
break;
case PickingGeometryType.Polygon:
vertexIds = new uint[vertexCount];
for (uint i = 0; i < vertexCount; i++)
{ vertexIds[i] = lastVertexId + i; }
positions = FillPickedGeometrysPosition(0, vertexCount);
break;
default:
throw new NotImplementedException();
}
}
PickedGeometry pickedGeometry = new PickedGeometry(arg.UsingViewPort, typeOfMode, positions, vertexIds, stageVertexId, this);
return pickedGeometry;
}
private PickedGeometry PickWhateverItIs(uint stageVertexId, uint lastVertexId, DrawMode mode, GeometryType typeOfMode)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.GeometryType = typeOfMode;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.From = this;
// Fill primitive's position information.
int vertexCount = typeOfMode.GetVertexCount();
if (vertexCount == -1)
{
vertexCount = this.positionBufferPtr.Length;
}
if (lastVertexId == 0 && vertexCount == 2)
{
// This is when mode is GL_LINE_LOOP and picked last line(the loop back one)
PickingLastLineInLineLoop(pickedGeometry);
return(pickedGeometry);
}
// Other conditions
switch (typeOfMode)
{
case GeometryType.Line:
pickedGeometry.Indexes = new uint[] { lastVertexId - 1, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(lastVertexId - 1, 2);
break;
case GeometryType.Triangle:
if (mode == DrawMode.TriangleFan)
{
pickedGeometry.Indexes = new uint[] { 0, lastVertexId - 1, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
}
else if (mode == DrawMode.TrianglesAdjacency || mode == DrawMode.TriangleStripAdjacency)
{
pickedGeometry.Indexes = new uint[] { lastVertexId - 4, lastVertexId - 2, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
}
else
{
pickedGeometry.Indexes = new uint[] { lastVertexId - 2, lastVertexId - 1, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(lastVertexId - 2, 3);
}
break;
case GeometryType.Quad:
pickedGeometry.Indexes = new uint[] { lastVertexId - 3, lastVertexId - 2, lastVertexId - 1, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(lastVertexId - 3, 4);
break;
case GeometryType.Polygon:
pickedGeometry.Indexes = new uint[vertexCount];
for (uint i = 0; i < vertexCount; i++)
{
pickedGeometry.Indexes[i] = lastVertexId + i;
}
pickedGeometry.Positions = FillPickedGeometrysPosition(0, vertexCount);
break;
default:
throw new NotImplementedException();
}
return(pickedGeometry);
}
private PickedGeometry PickWhateverItIs(uint stageVertexId, uint lastVertexId, DrawMode mode, GeometryType typeOfMode)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.GeometryType = typeOfMode;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.From = this;
// Fill primitive's position information.
int vertexCount = typeOfMode.GetVertexCount();
if (vertexCount == -1) { vertexCount = this.positionBufferPtr.Length; }
if (lastVertexId == 0 && vertexCount == 2)
{
// This is when mode is GL_LINE_LOOP and picked last line(the loop back one)
PickingLastLineInLineLoop(pickedGeometry);
return pickedGeometry;
}
// Other conditions
switch (typeOfMode)
{
case GeometryType.Line:
pickedGeometry.Indexes = new uint[] { lastVertexId - 1, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(lastVertexId - 1, 2);
break;
case GeometryType.Triangle:
if (mode == DrawMode.TriangleFan)
{
pickedGeometry.Indexes = new uint[] { 0, lastVertexId - 1, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
}
else if (mode == DrawMode.TrianglesAdjacency || mode == DrawMode.TriangleStripAdjacency)
{
pickedGeometry.Indexes = new uint[] { lastVertexId - 4, lastVertexId - 2, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
}
else
{
pickedGeometry.Indexes = new uint[] { lastVertexId - 2, lastVertexId - 1, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(lastVertexId - 2, 3);
}
break;
case GeometryType.Quad:
pickedGeometry.Indexes = new uint[] { lastVertexId - 3, lastVertexId - 2, lastVertexId - 1, lastVertexId, };
pickedGeometry.Positions = FillPickedGeometrysPosition(lastVertexId - 3, 4);
break;
case GeometryType.Polygon:
pickedGeometry.Indexes = new uint[vertexCount];
for (uint i = 0; i < vertexCount; i++)
{ pickedGeometry.Indexes[i] = lastVertexId + i; }
pickedGeometry.Positions = FillPickedGeometrysPosition(0, vertexCount);
break;
default:
throw new NotImplementedException();
}
return pickedGeometry;
}
private PickedGeometry SearchPoint(RenderEventArg arg, uint stageVertexId, int x, int y, uint lastVertexId, ZeroIndexPointSearcher searcher)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.From = this;
pickedGeometry.GeometryType = GeometryType.Line;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.Indexes = new uint[] { searcher.Search(arg, x, y, lastVertexId, this), };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return pickedGeometry;
}
private PickedGeometry PickWhateverItIs(PickingEventArgs arg, uint stageVertexId, uint flatColorVertexId, DrawMode mode, GeometryType typeOfMode)
{
//PickedGeometry pickedGeometry = new PickedGeometry();
//pickedGeometry.GeometryType = typeOfMode;
//pickedGeometry.StageVertexId = stageVertexId;
//pickedGeometry.FromRenderer = this;
// Fill primitive's position information.
int vertexCount = typeOfMode.GetVertexCount();
if (vertexCount == -1)
{
vertexCount = (from item in this.Node.PickingRenderMethod.PositionBuffers select item.Length).Sum();
}
uint[] vertexIds; vec3[] positions;
if (flatColorVertexId == 0 && vertexCount == 2)
{
// This is when mode is GL_LINE_LOOP and picked last line(the loop back one)
PickingLastLineInLineLoop(out vertexIds, out positions);
}
else
{
// Other conditions
switch (typeOfMode)
{
case GeometryType.Point:
vertexIds = new uint[] { flatColorVertexId, };
positions = FillPickedGeometrysPosition(flatColorVertexId, 1);
break;
case GeometryType.Line:
vertexIds = new uint[] { flatColorVertexId - 1, flatColorVertexId, };
positions = FillPickedGeometrysPosition(flatColorVertexId - 1, 2);
break;
case GeometryType.Triangle:
if (mode == DrawMode.TriangleFan)
{
vertexIds = new uint[] { 0, flatColorVertexId - 1, flatColorVertexId, };
positions = FillPickedGeometrysPosition(vertexIds);
}
else if (mode == DrawMode.TrianglesAdjacency || mode == DrawMode.TriangleStripAdjacency)
{
vertexIds = new uint[] { flatColorVertexId - 4, flatColorVertexId - 2, flatColorVertexId, };
positions = FillPickedGeometrysPosition(vertexIds);
}
else
{
vertexIds = new uint[] { flatColorVertexId - 2, flatColorVertexId - 1, flatColorVertexId, };
positions = FillPickedGeometrysPosition(flatColorVertexId - 2, 3);
}
break;
case GeometryType.Quad:
vertexIds = new uint[] { flatColorVertexId - 3, flatColorVertexId - 2, flatColorVertexId - 1, flatColorVertexId, };
positions = FillPickedGeometrysPosition(flatColorVertexId - 3, 4);
break;
case GeometryType.Polygon:
vertexIds = new uint[vertexCount];
for (uint i = 0; i < vertexCount; i++)
{
vertexIds[i] = flatColorVertexId + i;
}
positions = FillPickedGeometrysPosition(0, vertexCount);
break;
default:
throw new NotDealWithNewEnumItemException(typeof(GeometryType));
}
}
PickedGeometry pickedGeometry = new PickedGeometry(typeOfMode, positions, vertexIds, stageVertexId, this.Node);
return(pickedGeometry);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</param>
/// <param name="lastVertexId"></param>
/// <param name="primitiveInfo"></param>
/// <param name="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchLine(RenderEventArgs arg, uint stageVertexId, int x, int y, uint lastVertexId, RecognizedPrimitiveInfo primitiveInfo, OneIndexLineSearcher searcher)
{
var vertexIds = searcher.Search(arg, x, y, primitiveInfo, this);
vec3[] positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(arg.UsingViewPort, PickingGeometryType.Line, positions, vertexIds, stageVertexId, this);
return pickedGeometry;
}
private void PickingLastLineInLineLoop(PickedGeometry pickedGeometry)
{
const int vertexCount = 2;
var offsets = new int[vertexCount] { (this.positionBufferPtr.Length - 1) * this.positionBufferPtr.DataSize * this.positionBufferPtr.DataTypeByteLength, 0, };
pickedGeometry.Positions = new vec3[vertexCount];
pickedGeometry.Indexes = new uint[vertexCount];
for (int i = 0; i < vertexCount; i++)
{
OpenGL.BindBuffer(BufferTarget.ArrayBuffer, this.positionBufferPtr.BufferId);
IntPtr pointer = OpenGL.MapBufferRange(BufferTarget.ArrayBuffer,
offsets[i],
1 * this.positionBufferPtr.DataSize * this.positionBufferPtr.DataTypeByteLength,
MapBufferRangeAccess.MapReadBit);
unsafe
{
var array = (vec3*)pointer.ToPointer();
pickedGeometry.Positions[i] = array[0];
}
OpenGL.UnmapBuffer(BufferTarget.ArrayBuffer);
pickedGeometry.Indexes[i] = (uint)offsets[i] / (uint)(this.positionBufferPtr.DataSize * this.positionBufferPtr.DataTypeByteLength);
}
}
/// <summary>
/// 是三角形，就pick一个三角形；是四边形，就pick一个四边形，是多边形，就pick一个多边形。
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="primitiveInfo"></param>
/// <param name="typeOfMode"></param>
/// <returns></returns>
private PickedGeometry PickWhateverItIs(RenderEventArgs arg, uint stageVertexId, RecognizedPrimitiveInfo primitiveInfo, PickingGeometryType typeOfMode)
{
uint[] vertexIds = primitiveInfo.VertexIds;
vec3[] positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(arg.UsingViewPort, typeOfMode, positions, vertexIds, stageVertexId, this);
return pickedGeometry;
}
private PickedGeometry PickPoint(RenderEventArgs arg, uint stageVertexId, uint lastVertexId)
{
var vertexIds = new uint[] { lastVertexId, };
var positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(arg.UsingViewPort, PickingGeometryType.Point, positions, vertexIds, stageVertexId, this);
return pickedGeometry;
}